What Makes Higher Coffee-Growing Altitudes Change Tea Flavor?

High-mountain purple tea black tea from Lincang, Yunnan, grows above 2,000 meters with no pesticides or fertilizers, and the finished tea tastes creamy and sweet, reminiscent of peaches and sweet potato, with a soft body and almost no astringency. It is a distinct tea from the Zijuan variety of southern Yunnan, and the altitude itself is the main reason the flavor is so thick and full.

The mechanism parallels what happens with higher coffee: at altitude, nighttime temperatures drop sharply and oxygen levels fall, so the plant slows its metabolism and cannot consume all the compounds built up during the day. More of those compounds stay in the leaf. Nitrogen fertilizer reverses the effect, speeding growth and thinning the liquor.

High-mountain purple tea black tea from Lincang, Yunnan, is an extremely rare tea. It grows in pristine tea gardens at altitudes above 2,000 meters, without pesticides or fertilizers, with the tea trees growing naturally. This tea is completely different from Zijuan tea from southern Yunnan. The finished tea has creamy aromas and sweet notes reminiscent of peaches and sweet potato, with a soft, full-bodied mouthfeel and no astringency at all—so gentle that it can be enjoyed even on an empty stomach. This article will guide you through why high altitudes can produce such thick, rich tea flavor, as well as the unique origin, flavor, and tasting experience of this high-mountain purple black tea. Front Street Coffee recommends that you pay attention to this rare tea and experience the distinctive charm of Yunnan high-mountain tea.

Why can high altitudes produce good tea?

We humans are constantly inhaling oxygen and exhaling carbon dioxide. Plants, however, have two different ways of exchanging gases: during the day, plants absorb carbon dioxide and release oxygen, producing energy and various substances through photosynthesis; at night, plants do the opposite—absorbing oxygen and releasing carbon dioxide, just like us. In other words, plants are producers during the day and consumers at night. At higher altitudes, nighttime temperatures drop sharply, and oxygen concentration is also noticeably lower. This environment forces plants to slow down their metabolism and prevents them from consuming all the substances accumulated during the day. Because of this, more compounds are retained in the tea leaves, and the flavor becomes thicker and fuller.

When it comes to Phoenix oolong tea or Yunnan tea, altitude is often an unavoidable topic. Tea produced at high altitudes is smooth on the palate and has richer layers of flavor. However, once nitrogen fertilizer is applied, the tea trees grow faster, the tea liquor becomes thinner in taste, and the distinctive charm of high-mountain tea is greatly diminished.

Even in Yunnan, this tea is extremely rare.

In the Pu'er tea circle, it is widely known that purple tea originates from Nannuo Mountain in southern Yunnan. Its leaves are purple and the taste is very astringent. Through the efforts of the Yunnan Tea Research Institute, they developed a new variety called "Zijuan," which can significantly reduce astringency. The high-mountain purple tea we are introducing here, however, is a completely different variety—it is not Zijuan tea.

As far as I know, this tea only grows in a few specific areas of Lincang. It is said to have once been one of the wild tea tree varieties. So far, I have only seen this particular variety near the Myanmar border, such as in Zhenkang or Yongde County. It often appears at extremely high altitudes (over 1,800 meters). The color of the tea leaves is not truly purple—only the stems have a slight purple hue. Interestingly, once this tea is processed into Pu'er tea, it takes on a deep blue color. Lincang purple tea is completely different from the purple tea of southern Yunnan; they just happen to share the same name.

High-mountain purple black tea has no astringency at all, a very soft and full-bodied mouthfeel, and a strong aftertaste. Because the production areas of high-mountain purple tea are extremely limited and mostly located in remote mountain villages, I have never seen it processed into any tea type other than Pu'er tea.

A few years ago, a tea merchant mentioned that he had tried black tea made from high-mountain purple tea. According to him, it was made on a small scale by a friend of his. He told me that the flavor and mouthfeel of that tea were impressive. After learning about his experience, I became deeply interested in making black tea from high-mountain purple tea.

This tea is grown at an altitude of 2,000 meters. The tea garden is located above 2,000 meters, with no pesticides or fertilizers used, and the tea trees grow naturally in a balanced ecological environment. Once you taste this tea, you may notice that creamy aroma—a hallmark of typical high-mountain tea.

The sweetness is like peaches and sweet potato.

This purple black tea is made from high-quality early spring leaves. It is very soft on the palate—not bitter, not sour, not astringent. It is fine to drink even on an empty stomach. For the same reason, children also enjoy this tea. The flavor of high-mountain purple black tea is very unique; its sweet taste reminds me of peaches, nectarines, marigolds, sweet potato, and dried sweet potato. This tea is full-bodied with a strong aftertaste, and the sweetness lingers on the palate for a long time. It also pairs well with milk.

The above content is compiled by CoffeeHunters, a coffee news website.